8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body

Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Brain & Nervous System

No effects of short‐term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography

No Effects Found

Kwon MS, Vorobyev V, Kännälä S, Laine M, Rinne JO, Toivonen T, Johansson J, Teräs M, Joutsa J, Tuominen L, Lindholm H, Alanko T, Hämäläinen H. · 2012

View Original Abstract
Share:

Short-term cell phone radiation showed no immediate effects on brain blood flow, but longer-term impacts remain unstudied.

Plain English Summary

Summary written for general audiences

Finnish researchers used advanced brain imaging (PET scans) to measure blood flow in the brains of 15 healthy men while they were exposed to cell phone radiation at 902.4 MHz for 5 minutes. The study found no changes in brain blood flow patterns, even though the radiation did cause a slight temperature increase in the ear canals. This suggests that short-term cell phone exposure doesn't immediately alter how blood circulates through the brain.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 902.4 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 902.4 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 902.4 MHz Duration: 5 minutes

Study Details

The present study investigated the effects of 902.4 MHz Global System for Mobile Communications (GSM) mobile phone radiation on cerebral blood flow using positron emission tomography (PET) with the 15O‐water tracer.

Fifteen young, healthy, right‐handed male subjects were exposed to phone radiation from three diffe...

The exposure induced a slight temperature rise in the ear canals but did not affect brain hemodynami...

The results provided no evidence for acute effects of short‐term mobile phone radiation on cerebral blood flow.

Cite This Study
Kwon MS, Vorobyev V, Kännälä S, Laine M, Rinne JO, Toivonen T, Johansson J, Teräs M, Joutsa J, Tuominen L, Lindholm H, Alanko T, Hämäläinen H. (2012). No effects of short‐term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography Bioelectromagnetics. 33(3):247-256, 2012.
Show BibTeX
@article{ms_2012_no_effects_of_shortterm_2779,
  author = {Kwon MS and Vorobyev V and Kännälä S and Laine M and Rinne JO and Toivonen T and Johansson J and Teräs M and Joutsa J and Tuominen L and Lindholm H and Alanko T and Hämäläinen H.},
  title = {No effects of short‐term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography},
  year = {2012},
  doi = {10.1002/bem.20702},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.20702},
}
DOI: 10.1002/bem.20702

Cited By (14 papers)

Quick Questions About This Study

A 2012 Finnish study found no changes in brain blood flow when 15 healthy men were exposed to cell phone radiation for 5 minutes. The researchers used advanced PET brain imaging to measure circulation patterns during exposure to 902.4 MHz radiation and detected no significant effects on how blood flows through the brain.
Research using precise brain imaging shows no immediate effects on brain circulation from short-term mobile phone exposure. A controlled study exposed participants to cell phone radiation for 5 minutes while monitoring brain blood flow with PET scans, finding no changes in circulation patterns despite detecting slight ear canal warming.
A 2012 study found no acute effects on brain function from GSM phone radiation exposure. Researchers monitored 15 men during 5-minute exposures to 902.4 MHz radiation, measuring both brain blood flow and task performance. Neither brain circulation nor cognitive performance showed any changes during the exposure period.
Short-term cell phone exposure doesn't appear to impact brain blood vessels based on advanced imaging studies. Finnish researchers used PET scans to monitor brain circulation during 5-minute exposures to cell phone radiation, finding no changes in blood flow patterns even though the radiation caused slight temperature increases in ear canals.
Current research suggests minimal acute risks to brain blood flow from short-term phone radiation exposure. A controlled study using precise brain imaging found no changes in circulation patterns during 5-minute exposures to cell phone frequencies, indicating that brief phone use doesn't immediately alter how blood flows through your brain.